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David Hart

David Hart - California Water Science Center

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Side-looking acoustic Doppler velocity meter and water quality sonde

Flow and Water Quality Data in the San Francisco Estuary

The San Francisco Bay and Sacramento-San Joaquin Delta form one of the largest estuaries in the United States. Water flow and water quality in the San Francisco Bay-Delta Estuary are important to the economies of both California and the nation. The Bay-Delta system provides water to more than 25 million California residents and vast farmlands, as well as key habitat for birds, fish, and other...
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California Water Science Center
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Flow and Water Quality Data in the San Francisco Estuary

The San Francisco Bay and Sacramento-San Joaquin Delta form one of the largest estuaries in the United States. Water flow and water quality in the San Francisco Bay-Delta Estuary are important to the economies of both California and the nation. The Bay-Delta system provides water to more than 25 million California residents and vast farmlands, as well as key habitat for birds, fish, and other...
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Acoustic doppler current profiler (ADCP) data collection of water flow at Benicia Bridge, 2004

This data release contains acoustic Doppler current profiler (ADCP) data used in generating a model of sediment flux through Carquinez Strait, CA at Benicia Bridge. The ADCP outputs binary data files containing measurement scheme, location, time, velocity, backscatter, boat heading, depth, and other parameters. There are two forms of data provided, one collected from two transects along...
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California Water Science Center

Acoustic doppler current profiler (ADCP) transect data at Benicia Bridge and Mallard Island, 2019

Field observations of water and suspended-sediment fluxes were conducted at Benicia Bridge and Mallard Island during the 2019 water year wet season to capture suspended-sediment flux during elevated Sacramento-San Joaquin Delta discharge. Measurements occurred on two occasions: 1) 26th of February 2019 at Benicia Bridge and Mallard Island, following a storm event that increased delta...
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California Water Science Center

Erodibility Data from Gust Erosion Chamber Experiments in Grizzly Bay and San Pablo Bay, California, Winter 2020

A Gust erosion chamber was used to apply horizontal shear stress to sediment cores obtained from San Pablo and Grizzly (within Suisun) Bays in California. A pair of sediment cores were collected from the same approximate locations in each bay five times between January 22nd, 2020 and March 11th, 2020 for a total of 10 experiments and 20 sediment core results. Locations were chosen to...
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California Water Science Center

Erodibility Data from Gust Erosion Chamber Experiments in Grizzly Bay and San Pablo Bay, California, Summer 2019

A Gust erosion chamber was used to apply horizontal shear stress to sediment cores obtained from San Pablo and Grizzly (within Suisun) Bays in California. A pair of sediment cores were collected from the same approximate locations in each bay six times between June 12th, 2019 and August 15th, 2019 for a total of 12 experiments and 24 sediment core results. Locations were chosen to...
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California Water Science Center

Sand supply to San Francisco Bay from the Sacramento and San Joaquin Rivers of the Central Valley, California

Sediment from the Central Valley via the Sacramento-San Joaquin Delta (Delta) and Suisun Bay is a primary source of sand to San Francisco Bay, California. Sand is mined from San Francisco Bay for commercial purposes, such as for use in concrete for construction. To better understand the supply of sand to Suisun Bay and San Francisco Bay, the U.S. Geological Survey (USGS), in cooperation...
Authors
Mathieu D. Marineau, David Hart, Christopher Palumbo Ely, Lester J. McKee
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Water Resources Mission Area, California Water Science Center

Coordinated river infrastructure decisions improve net social-ecological benefits

We explore the social, ecological, economic, and technical dimensions of sustainable river infrastructure development and the potential benefits of coordinating decisions such as dam removal and stream crossing improvement. Dam removal is common practice for restoring river habitat connectivity and ecosystem health. However, stream crossings such as culverts are often 15 times more...
Authors
Samuel G. Roy, Adam Daignault, Joseph D. Zydlewski, Allison Truhlar, Sean M.C Smith, Shaleen Jain, David Hart
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Cooperative Research Units

A multiscale approach to balance trade-offs among dam infrastructure, river restoration, and cost

Aging infrastructure and growing interests in river restoration have led to a substantial rise in dam removals in the U.S. However, the decision to remove a dam involves many complex trade-offs. The benefits of dam removal for hazard reduction and ecological restoration are potentially offset by the loss of hydroelectricity production, water supply, and other important services. We use a...
Authors
Samuel G. Roy, Emi Uchida, Simone P. de Souza, Ben Blachly, Emma Fox, Kevin Gardner, Arthur J. Gold, Jessica S. Jansujwicz, Sharon Klein, Bridie McGreavy, Weiwei Mo, Sean M.C Smith, Emily Vogler, Karen A. Wilson, Joseph D. Zydlewski, David Hart
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Cooperative Research Units

Seismic properties of Leg 195 serpentinites and their geophysical implications

Knowledge of seismic velocities is necessary to constrain the lithologies encountered in seismic studies. We measured the seismic velocities, both compressional and shear wave, of clasts recovered during Ocean Drilling Program Leg 195 from a serpentine mud volcano, the South Chamorro Seamount. The compressional wave velocities of these clasts vary from a lower value of 5.5 km/s to an...
Authors
Anna M. Courtier, David Hart, Nikolas I. Christensen

The value of long-term monitoring in the development of ground-water-flow models

As environmental issues have come to the forefront of public concern, so has the awareness of the importance of ground water in the overall water cycle and as a source of the Nation’s drinking water. Heightened interest has spawned a host of scientific enterprises (Taylor and Alley, 2001). Some activities are directed toward collection of water-level data and related information to...
Authors
Daniel T. Feinstein, David Hart, James T. Krohelski
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Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center

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